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(No Model.) l

H. G. BLODGET.

GOLD WASHING MACHINE. No. 363,198. Patented May 1'7, 1887.

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WITNESSES: INVENTOR:

ATTORNEYS.

N. PETERS Photo-Lilhngnphnr. Washingmn. u c.

' U ITED STATES PATENT @FHCEO HENRY G. BLODGET, OF HARRISBURG, OREGON, ASSIGNOR OF ONEHALF TO IVILLIAM KRIESEL, OF SAME PLACE.

GOLD-WASHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 363.198, dated May 17, 1887.

Applicatinn filed April Ell, 1586v Serial No. 199,670. (No model.)

To all whom it may concern.-

Be it'known that I, HENRY G. BLODGET, of Harrisburg, in the county of Linn and State of Oregon, have invented a new and Improved Gold-\Vashing Machine, of which the following is a full, clear, and exact description.

The object of my invention is to provide a new and improved gold-washing machine in which very fine gold is saved from sand and pulp without using a great quantity of water. The invent-ion consists of various parts and details and combinations of the same, as will be fully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this speeifieation,in which similar letters of reference indicate corresponding parts in both figures.

Figure 1 is a longitudinal sectional elevation of my improvement. Fig. 2 is a vertical cross-section of the same on the line 00 a: of Fig. l.

0n the tank A, which is partly filled with water, is mounted to rotate in suitable bear ings the inclined shaft B, provided on its outer end with the driving -pulley G. The spokes D are secured to the shaft B, and are attached to the perforated cylinder E, placed inside of the tank A, and open at both ends. The spokes D extend a short distance beyond the perforated cylinder E, and are each pro vidcd at their outer ends with rubber bumpers 13, which support the drum G. The said drum G is made in two parts, which are united by the hinges H, and can be closed by a locking device, I, of any suitable construction. The perforated cylinder E and the drum Gare concentric with the shaft 13. The drum G is openat its lower end, and is provided at its upper end with an inwardly-projecting flange, G. v

The level of the water iuthe tank A reaches within a short distance of the shaft 13, so that the lower parts of the perforated cylinder E and the drum G are submerged in the water throughout their whole length. The inner surface of the drum G is lined with silver-plated copper plates charged with quicksilver.

The operation is as follows: A rotary motion is given to the inclined shaft 13 by revolving the driving'pulleyC, which imparts a rotary motion to the perforated cylinder E and the drum G. The pulp or sand containing very fine gold is fed into the perforated cylinder E by means of a hopper, J, or other suitable device, and by the rotation of the cylinder E and the action of the agitated water in the tank A the coarse pulp and gravel pass downward in the cylinder E, and are deposited at the lower end of the same in the tank A, while the sand and line pulp pass through the perforations in the cylinder E upon the drum G, which, with its copper plates charged with quicksilver, gathers the fine gold,and the charged into the tank A at the lower end of the drum G. The coarse pulp, gravel, and tailings are removed from the tank A by an elevator or any other suitable means.

The drum G can be removed from the tank A whenever necessary by unlocking the locking device I, so that the two hinged parts of the drum will swing from each other, and the drum can then be lifted out of the tank without disturbing any of the other parts of the machine.

The water in the tank A can be used continuously, and in case that a solution of salt, potash, or acids should be necessary to overcome grease or other foreign substances in certain pulp the expense of the solution would be comparatively small, as the solution, like the water, would be used over and over again.

It will be seen that the apparatus can also be mounted on a frame without the tank and placed in a stream having running water, which passes through the perforated cylinder and the drum.

I am aware that two concentric cylinders, the inner one being perforated and. both adapted to be revolved, is old; and I am also aware that a casing inclosiug a paddle-wheel has been made in two parts hinged together,and I there fore do not claim such inventions.

Having thus fully described my invention, I

Patent- 1,, A goldwashing machine consisting of a tank, a shaft jcurnaled in the said tank and provided with spokes, a perforated cylinder tailings pass down the drum G and are dis claim as new and desire to secure by Letters IGQ having open ends and secured to the spokes of the shaft ashort distance from their outer ends, and a sectional casing surrounding the perforated cylinderandsupported by the said spokes,

" 5 the said casing having its inner surface provided with copper plates charged with quicksilver, substantially as herein shown and described.

2. In a gold-Washing machine, the tank A 10 and the inclined shaft B, having thespokes D,

provided with the rubber bumpers F, in combination with the perforated cylinder E, secured to the said spokes D, and the drum G, having on its inner surface copper plates charged with quicksilver and being supported 15 on the rubber bumpers F, substantially as shown and described.

HENRY G. BLODGET.

Witnesses:

WM. KRIESEL, J A MES RILEY. 

